Comment by jawns

True, the answer is always going to be "no" depending on how hard-lined you are about privacy.

But with a few reasonable concessions, you can get a lot of benefit.

For instance, most people believe that the government itself be able to verify your identity, through birth certificates or passports or drivers licenses or tax IDs.

If you're willing to allow the government to verify your identity, how about a trusted private company that you get to select?

If that company is then trusted by others as an identity verifier, then although you may have to reveal your identity to one trusted entity, you don't have to reveal your identity to any of the others that accept their attestations about attributes like age.